Malicious PDF — malware analysis report

Static analysis result for SHA-256 643cca72a39adff6…

MALICIOUS

PDF

72.7 KB Created: 2021-09-18 17:18:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2b76477612b42b1fa475b9c36d39950d SHA-1: 3323a54b351e698ff2c5aaed5c901a5b43215aba SHA-256: 643cca72a39adff615fce1b3aee1183887197e4a8ae469e89ee18f436bdfbbae
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using non-clustered link farms on disposable hosting, suggesting an attempt to obscure malicious destinations. The presence of embedded JavaScript, combined with the link farm, points towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://queure.ru/uplcv?utm_term=how+to+train+your+dragon+2+full+movie+in+english PDF link annotation
    • http://ytlcases.com/userfiles/file/tibugalabazoxoninadulif.pdfIn PDF document text
    • http://otczenacts.com/media/files/wexigelotet.pdfIn PDF document text
    • http://eros-arena-reutlingen.de/eros/userfiles/file/wipadasobakopilakebumomiw.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/161373b7cd443d---39409582050.pdfIn PDF document text
    • http://propertiesforrent.com/userfiles/file///29842238698.pdfIn PDF document text
    • https://gotoko.com/cmsv2/upload/files/64472763011.pdfIn PDF document text
    • http://plechotice.sk/tmp/file/42641512624.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/249fvllhrathqcvt15p1dtk4pt/7261513320.pdfIn PDF document text
    • https://sherwoodchamber.org/ckfinder/userfiles/files/85235849615.pdfIn PDF document text
    • https://haciendaloscipreses.cl/upload/file/54185157984.pdfIn PDF document text
    • http://pallenberg-busreisen.de/uploads/files/powumokovewoxugenumewo.pdfIn PDF document text
    • https://lazdynumokykla.lt/userfiles/file/42088930035.pdfIn PDF document text
    • http://szsahsh.com/uploads/files/lanosew.pdfIn PDF document text
    • http://hagakure.by/upload/editor/files/zofidagituwodudum.pdfIn PDF document text
    • http://www.fuchingrading.com/upload/file/65214953702.pdfIn PDF document text
    • https://mayphotocopydogia.com/upload/files/zevirosare.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16137b7f5bf4ed---90899678380.pdfIn PDF document text
    • http://goodtraefarm.com/ckupload/files/tovufukap.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/5525f09720059dc0dbcbdf5cd4b9f88c/kovibuj.pdfIn PDF document text
    • http://daieimotors.com/js/upload/files/sitesisesimafegija.pdfIn PDF document text
    • http://tomboy2.com/images/library/File/11992540936.pdfIn PDF document text
    • http://www.sanjuktabanerjee.com/fckimages/file/31028210354.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b6c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6C9 17068 bytes
SHA-256: d1ffed9c8a0f7925b59ca0e4d74583b4dee33e700b026251c8e7edddaf40a670
font_01_sfnt_off0000e2c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fad7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD7 11280 bytes
SHA-256: 6b58b294e6cf970d5cdd6bcedb1f8879d1381d1ea6c7ec17f69cf8ca350cc064

Open this report in the interactive analyzer, or submit your own file for analysis.